Ok, trying to summarize what is missing (everything from sets which exist in HQ to obvious things like Summer Edition):
1. Exist in token archives but are missing in main archives:
- Dragon's Maze Tokens
- Zendikar Tokens
2. Missing cards (exist in HQ):
- Anthologies
- Battle Royale
- Beatdown
- Coldsnap Theme Decks
- Collectors' Edition
- Commander's Arsenal
- Deckmasters: Garfield vs. Finkel
- Duels of the Planeswalkers
- Multiverse Gift Box
- Planechase (2012 Edition)
- Arabian Nights - 14 alternate cards
- Duel Decks: Venser vs. Koth - 1 emblem (
Koth of the Hammer)
- Planeshift - 3 alternate foil cards
3. Missing cards (don't exist in HQ yet):
- Magic 2014 Tokens - 13 cards
- From the Vault: Twenty
- Theros
- Pro Tour Collector's Set
- World Championship Decks 1997-2004
- Hachette Magic Encyclopedia Inserts - 60 cards
- Summer Magic Edition - 306 cards
- Tenth Edition Alternate
Foil Cards - 125 cards
- Unhinged Alternate
Foil Cards - 26 cards (correct me if I'm wrong)
4. Oversized cards (exist in XLHQ already):
- Commander Oversized Cards - 20 cards + back
- Commander's Arsenal Oversized Cards - 10 cards
-
Helvault Oversized Cards - 5 cards + back
- Planechase & Promotional Planes - 46 cards + back
- Planechase (2012 Edition) Planes - 40 cards
- Vanguard - 32 cards + back
5. Oversized cards:
-
Helvault Oversized Cards - 5 foil cards
- 6x9 Cards - 94 cards + 4 different backs (correct me if I'm wrong)
- Eighth Edition Box Topper Cards - 33 cards and backs + 6 promo cards
- Italian Junior League Oversized Promos - 10 cards + back
- Magic Player Rewards Oversized Promos - 10 cards with backs
- Ninth Edition Box Topper Cards - 13 cards with backs
-
Time Spiral Oversized Promos - 3 cards with backs
6. Backs:
- usual back
- Collectors' Edition back
- International Collectors' Edition back
7. All promo cards and tokens
8. All support cards with backs
9. Simplified Chinese and Japanese alternate art cards
10. Misprints
Thanks!